Improvement in locks



ATENT OFFICE.

HENRY HARTWIG, OF NEV YORK, N. Y.

IMPRQVEMENT IN LOCKS.

Specification forming part of Letters Fatent No. 32,226, dated April 30, 1861.

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'Be it known that I, YHENRY HARTWTG, of New York, in the county and State of VNew York, have invented a new and useful Improvenient in Locks; and I hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

The nature of my invention consists in the arrangement of a slide or wedge operated bya spring, so as to cover up partly the key-hole, said slide or wedge being pressed clearof the keyhole by the introduction of a wedge-shaped key.

Figure I represents the inside of a lock with the back plate removed, and Fig. II is a sec- `tion at the line III IV.

` upon by a spring, S, in such a manner as to press and hold the said slide E in a position to close the lower part of the key-hole. A

projection, o, on the lock-case Aprevents said slide E from being pressed too far forward. The forward end of this slide E is rounded or made wedge-shaped. In Figs. V and VI the end of the key is represented. a is the barrel of the saine, which fits over the key-pin D, and w the bit in which the wads are cut out. The outer end of this bit w is made pointed or wedge-shaped. into the key-hole, the straight side of the bit bears against one side of the key-hole, while the slanting or wedgeshaped side acts upon the wedge-shaped end of the sliding piece E, pressing the saine clear of the key-hole, so as to allow the key to enter the lock-case and then operate the bolt B in the usual manner.

What I claim as my invention, and desire to secure by Letters Patent, is-

The arrangement and use of a wedge-shaped sliding piece, E, covering up the lower part of the key-hole, and operated by the introduction of the wedge-shaped bit of the key, as described.

l HENRY HARTWIG.

Witnesses:

HENRY E. ROEDER,

JULIAN KEEN.

When the key is introduced 

